1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 889 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
2. 2.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
5. 5.396 + 693 =
6. 6.792 + 297 =
7. 7.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 532. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.495 + 594 =
10. 10.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.594 + 495 =
12. 12.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Take 315. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
21. 21.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 115. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.297 + 792 =
30. 30.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 559: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.198 + 891 =
34. 34.891 + 198 =
35. 35.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 298: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 638. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?

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